git for deployment

I'm using darcs for a while now, and I like it. I don't use much
advanced features, but it's mostly unvisible, except for not
intelligently merging my ramblings files (for which it is not really
to blame).
But.. It's slow.
I'd like to give git a try, but only for deploying the zwizwa website,
to see if fast rollback is possible: if it doesn't work, rollback
immediately and possibly automatically.